Authors’ Biographical Sketch:

Bong-Geun An is a Professor of the Department of Management, KeiMyung University, DaeGu, Korea. He received his Ph.D. and MBA degrees from Washington State University, and his B.S. degree in Engineering from Seoul National University. His research interests are in the area of operations management; especially inventory control, Taguchi’s method of process control, time series modeling and forecasting. His work has been published in such journals as Naval Research Logistics, Korean Management Science Review, Journal of the Korean Operations Research and Management Science Society, Research Institute for Industrial Management (Korea), Korean Journal of Production and Operations Management, and others.

Min-Chiang Wang is a Professor of the Department of Management and Decision Sciences, Washington State University. He received his Ph.D. and M.S. degrees in Statistics from University of Wisconsin – Madison, and his B.A. in Accounting from the National Chengchi University, Taiwan. His research interests include: statistical process control and improvement, quality management, inventory control and modeling, multivariate statistical analysis, time series analysis. His work has been published in such journals as Biometrika, Communications in Statistics, Computational Statistics and Data Analysis, European Journal of Operational Research, International Journal of Management Theory and Practices, International Journal of Production Research, International Journal of System Science, Journal of Statistical Computation and Simulation, Journal of Statistical Planning and Inference, Naval Research Logistics, and others.